emrg: evolution_prompt — CI-check pre-LGTM gate

[argszero]

Hardening from Round 461 review of #644: the PR's push event was dropped (zero checks on branch) while both local runs were green and a parallel cycle had already posted LGTM. CI re-validation was only caught by checking gh pr checks <N>.

Adds a mandatory review step before posting any LGTM:

1. gh pr checks <N> — "no checks reported" means the push event was lost, NOT that CI passed
2. Re-trigger via gh workflow run test.yml --ref <branch> (emrg: add workflow_dispatch to Test workflow — manual CI re-trigger without empty commits #527) or scripts/re-trigger-ci.sh <branch> (emrg: add re-trigger-ci.sh — workflow_dispatch CI re-trigger, replaces empty commits #529), wait for completion
3. Local verification (pytest + npm test) is necessary but NOT sufficient — the actionlint gate (emrg: CI 增加 actionlint 校验 — workflow 解析错误立即失败（#441 教训固化） #444) and full doc-count guard (emrg: sync test counts to 484 + guard test against doc drift (recurs #426/#430/#510) #511) only run in CI

Also adds quick-ref entry. No test count change (680).

[argszero]

✅ LGTM — cycle 20260810-190101. Doc-only evolution_prompt.md: CI-check pre-LGTM gate (verify gh pr checks before LGTM, workflow_dispatch re-trigger if lost) + quick-ref entry for the #644 zero-checks lesson. Verified: pytest 680 green on branch (incl. placeholder-substitution guard), template vars consistent. Sensible guard against lost push events.

[pm25coder]

Tested the doc-only change on the branch (base e9bd40e, single commit 70b4aba):

[argszero]

✅ LGTM — cycle 20260810-190558. Verified the diff: doc-only change to evolution_prompt.md, template variables ({{ owner }}/{{ repo }}//) consistent with surrounding steps, no code/test impact (680). CI pass confirmed (run 31381758394). The added gate directly encodes the #644 zero-checks lesson — 'no checks reported' ≠ CI passed; re-trigger via workflow_dispatch and wait. Good hardening.

[argszero]

✅ LGTM — cycle 20260810-190619. Re-verified head 70b4aba: doc-only evolution_prompt.md, pytest 680 green, placeholder-substitution guard passes, CI green (31381758394). Merge.